No team has ever overturned a 5-2 first-leg defeat away from home in the Champions League.

As long as that remains the same after the semi-final second leg, they'll be very happy.

Jurgen Klopp's Reds are in a fantastic position heading into Wednesday's showdown, although two late goals from Roma in the first leg have given the Serie A side a glimmer of hope.

But what else do the stats tell us ahead of the big game?

Here are 14 standout facts from our friends at Opta...

1.

The omens look good for Liverpool heading into the second leg of their Champions League semi-final against Roma (Image: Getty Images Europe)

No team has ever overturned a 5-2 first-leg defeat away from home in the European Cup/Champions League. The last time there was such a scoreline in a first-leg of the competition was in 1999/00, with Valencia knocking out Lazio 5-3 on aggregate (5-2, 0-1).

2.

The first-leg produced the joint-most goals of any Champions League semi-final game (also seven when Ajax beat Bayern Munich 5-2 in 1995).

3.

Liverpool are yet to lose to Roma in the European Cup/Champions League in four meetings (W2 D2), with one of those draws in the 1984 final (1-1), which Liverpool won 4-2 on penalties in the Stadio Olimpico.

4.

Can Liverpool make it to the Champions League final? (Image: PA)

This is Liverpool’s 10th appearance in the semi-final of the European Cup/Champions League – they’ve progressed to the final on seven of the previous nine occasions, losing only in 1964/65 against Internazionale and in 2007/08 against Chelsea.

5.

Roma are appearing in their first European semi-final for 27 years, when they faced Brøndby in the UEFA Cup in 1990/91. Their only previous European Cup/Champions League semi-final was in 1983/84, when they eliminated Dundee United to face Liverpool in the final.

6.

Roma have yet to concede at home in the Champions League this season. Can Liverpool change that? (Image: Andrew Powell)

Roma are the only team yet to concede a single goal at home in the Champions League this season (5 games). They have also won each of their last four such games at the Olimpico (incl. two by three clear goals), but have never won five in a row.

7.

Meanwhile, Liverpool are still the only unbeaten side in the Champions League this season (W7 D4).

8.

The Reds have scored 38 goals in this season’s competition, the most by an English team in a single Champions League campaign. In fact, since the new format was introduced in 2003/04, only Real Madrid (41 goals in 2013/14) scored more than Liverpool have this season.

9.

Liverpool are the first side in Champions League history to see three players score 8+ goals in a single season (Salah 10, Firmino 10, Mané 8).

10.

Mohamed Salah has scored in each of his last five Champions League starts for Liverpool, a feat only Steven Gerrard had previously accomplished for the club between October 2007 and February 2008).

11.

Firmino has been in excellent form in Europe (Image: John Powell)

Roberto Firmino is the joint-quickest player to reach the 10-goal mark in the Champions League, having accomplished it in only 11 games (same as Adriano).

Also, only Cristiano Ronaldo (18) has been involved in more goals than the Brazilian (16 – 10 goals, 6 assists) in this season's competition.

12.

James Milner has provided eight assists in the Champions League this season, the joint-most ever in a single campaign in the competition since the new format was introduced in 2003/04, level with Neymar in 16/17.

13.

Roma striker Edin Dzeko certainly knows where the net is (Image: AFP)

Edin Dzeko has scored in each of his last four Champions League games, the longest ever run in the competition for a Roma player.

14.

Roma goalkeeper Alisson has saved all 20 shots on target he’s faced at the Olimpico in this season’s Champions League.